Wow they be out there and they vote And get on the internet and give inept advice and have no working knowledge in the field
Even an idiot would know a snake should not be used is one suspects grease in a line
It takes a real genius (NOT) to realize a snake is like a rod and anyone who ever had a can of grease knows placing a rod in the grease one the rod is pulled out the hole will close up
Much like the idiots who use a cable (snake) to clear a line blocked with soil or sand.
Take a pail of sand and place a screw drive or rod in it then take the screw driver or rod out and notice how the sand fills the void... Now place a garden hose in the same bucket and notice how the sand dissipates.. This is the theory of water jetting Vs rodding
Before taking any advice ask yourself what actual qualifications does the advice giver have?